I have NO sin!"

Yesterday at work I was working with a quiet, tired patient when in wheeled a guy in an electric wheelchair. He had come to visit the patient on the other side of the room. Before he got very far my patient pointed at him and bellowed, "I have NO sin!" The guy in the wheelchair looked a little aghast and backed out of the room without comment. I said to my patient, "What was that all about?" He said, "I was just messing with him." Although I felt bad for the gentleman who had been messed with, I could not help but laugh.

I later told one of my many Christian coworkers about it, and she said, "Maybe the world is going to end in December after all." I don't know if she was offended by it. I was hoping she would find it amusing. I know Christians take their sin seriously though, and this is one of my huge problems with Christianity. I know what they say, but I fail to see the logic in how a god's sacrifice of himself to himself redeems humankind's "sin" for all of eternity? If I understand them correctly, and I am really trying to, I, a nonbeliever, am supposed to have faith that a guy who may have lived and died two thousand years ago caused himself to be brutally killed so that I will not suffer eternal separation from him because of, let's say, the entire decade of the 1980's? I don't even remember half... er... some of it. It is entirely baffling to me. I keep trying to understand it but I can't help feeling like I must have missed something. I was probably too busy sinning.